Another way to demonstrate the existence of past and future lives is to examine the process of sleeping, dreaming and waking, because of its similarity to death, intermediate state and rebirth. When we fall asleep, our gross inner winds gather and dissolve within ourselves and our mind becomes increasingly subtle until the very subtle mind of the clear light of sleep is manifest. When this happens, we experience deep sleep and externally, it seems like we're dead. Then our mind becomes gradually coarser time and go through the different levels of the dream state. Finally, to recover the memory and mind control, we woke up. At that time, our dream world disappears and we perceive the world of the waking state.
When we die, a similar process occurs. At death, the winds dissolve within ourselves and our mind becomes increasingly subtle until the very subtle mind of the clear light of death becomes manifest. The experience of the clear light of death is similar to that of deep sleep. When the clear light of death has ceased, we experience the stages of the intermediate state, or bardo in Tibetan, which is like a dream-like state that occurs between death and rebirth. After a few days or weeks, the intermediate state ends and we take rebirth. Upon awakening from a dream, the dream world disappears and we perceive the world of the waking state. Similarly, when we take rebirth, the appearances of the intermediate state cease and we perceive the world of our new life.
The main difference between the process of sleeping, dreaming and waking, and death, intermediate state, and rebirth is that after the clear light of sleep has ceased, the connection between mind and body is maintained, while when the clear light of death ceases, the connection is broken. This is another proof of the existence of past and future lives.
Usually, we think that objects that appear in dreams are not real, while we perceive when we are awake themselves are; but Buddha said that all phenomena are like dreams because they are nothing more than mere appearances to mind. For those who know how to interpret them correctly, dreams can reveal certain meanings. If, for example, we dream we visited a country where we have never been, it may indicate the following: we were in that place in a past life, which we will visit later in this life or in a future, or have had any relationship with him recently, as have seen on television, have received a letter from there, and so on. Similarly, if we dream that we fly, it may mean that in a past life we were a being who could fly like a bird or a meditator with supernatural powers, or perhaps a prediction of what will be in the future. Dream that we fly you can also have a less direct meaning and symbolize simply an improvement of our physical or mental health.